BA3826 데이터 시트보기 (PDF) - ROHM Semiconductor

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BA3826

Band-pass filter for spectrum analyzer

ROHM Semiconductor 

Audio ICs

BA3826S

(b) For DET, after release of RESET, there is a dis-

charge time of 14mS (Max.)

The read enable period for Vo starts 0.5ms after the out-

put switch logic settles.

(6) Output switch circuit

This circuit uses time division switching to output the

peak hold signal from each DET.

Switching occurs when the control signal reaches 1.4V,

and when A, B, and C are all high, output is disabled

(GND level). Refer to the table below regarding the out-

put switching logic.

The recommended output load resistance is 10kΩ.

(5) Application example with reduced cycle time

The transition characteristics for the band-pass filter are

shown in the graph below. The time for at least 5 fo cycles

is required until the DET output peaks. Therefore, the

lower the frequency, the longer the time required and fo1

requires the longest time. Refer to the values given below

for applications that require a shorter cycle time.

When fo1 = 60Hz, the time requires for output u 60% is

tg u 45ms.

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